Variable box spanner capable of fastening and dissembling bolts of various sizes by using movable bolt head protrusion latch and adjustment screw

Abstract

The present invention provides a spanner box including a main shaft ( 3 ) which has a cylindrical shape, a screw thread ( 3 - 2 ) is formed in a central region of an outer side surface, a side surface is cut from the central region, a second spring groove ( 3 - 3 ) is formed in a bottom surface of the bolt head protrusion latch movement groove ( 3 - 4 ), and one end portion of an elastic part ( 4 ) is disposed in the second spring groove ( 3 - 3 ), first bolt head protrusion latches ( 1 ) each of which having a thickness suitable for being insertable into the main shaft coupling bolt tab ( 3 - 5 ), an irregularity ( 1 - 1 ) is formed in a bottom surface of a lower end portion, a spring groove ( 1 - 4 ) is formed at one side of a bottom surface of an upper end portion, and a movement groove ( 1 - 2 ) is formed at a center of a side surface.

1 . A spanner box comprising:
 a main shaft ( 3 ) which has a cylindrical shape and in which a ratchet tetragonal groove ( 3 - 1 ) to which a ratchet is coupled is formed in one end surface, a screw thread ( 3 - 2 ) is formed in a central region of an outer side surface, a side surface is cut from the central region in a circumferential direction to form a bolt head protrusion latch movement groove ( 3 - 4 ) having a   shape and a main shaft coupling bolt tab ( 3 - 5 ) formed at one side of the bolt head protrusion latch movement groove ( 3 - 4 ), a second spring groove ( 3 - 3 ) is formed in a bottom surface of the bolt head protrusion latch movement groove ( 3 - 4 ) in a shaft axial direction, and one end portion of an elastic part ( 4 ) is disposed in the second spring groove ( 3 - 3 );   first bolt head protrusion latches ( 1 ) each of which is formed in a rod shape having a thickness suitable for being insertable into the main shaft coupling bolt tab ( 3 - 5 ) and in which an end portion of one side of an upper surface is formed to be inclined, an irregularity ( 1 - 1 ) is formed in a bottom surface of a lower end portion in a longitudinal direction, a spring groove ( 1 - 4 ) is formed at one side of a bottom surface of an upper end portion so that the other end of the elastic part is insertable into the spring groove ( 1 - 4 ), and a movement groove ( 1 - 2 ) is formed at a center of a side surface to have a size corresponding to a thickness of a sleeve part of the main shaft ( 3 ) so as to be hooked when inserted into the main shaft coupling bolt tab ( 3 - 5 );   an adjustment screw ( 2 ) which is formed in a pipe shape and in which a screw part ( 2 - 2 ) corresponding to the screw thread ( 3 - 2 ) of the main shaft ( 3 ) is formed on an inner circumference and a skid prevention knurling treatment is performed on an outer surface extending from the screw part ( 2 - 2 ); and   a reverse-rotation prevention nut ( 5 ) which is formed in a disc shape and in which a screw part ( 5 - 1 ) corresponding to the screw thread ( 3 - 2 ) of the main shaft ( 3 ) is formed on an inner circumference and a skid prevention knurling treatment is performed on an outer surface,   wherein the adjustment screw ( 2 ) is rotated to change a position of the inclined portion ( 2 - 1 ) so as to adjust distances between the first bolt head protrusion latches ( 1 ).   
     
     
         2 . A spanner box comprising:
 a second sliding plate ( 6 ) which is formed in a pipe shape of which an end surface of one side is closed and in which a rotary shaft groove ( 6 - 2 ) of a main motion conversion shaft is formed to pass through a central region of the closed end surface, second bolt head protrusion latch movement grooves ( 6 - 1 ) are radially formed in linear shapes at angular intervals of 120° about the rotary shaft groove ( 6 - 2 ) to pass therethrough, and a stopper movement groove ( 6 - 3 ) is formed at one side of a side surface;   a main motion conversion shaft ( 7 ) which includes a disc plate ( 7 - 1 ) having a diameter smaller than an inner diameter of the second sliding plate ( 6 ), reverse-rotation prevention teeth ( 7 - 3 ) formed in a region, which is greater than  1 / 3  of an outer circumferential surface, on the outer circumferential surface of the disc plate ( 7 - 1 ) in a direction perpendicular to the disc plate ( 7 - 1 ), a protruding portion ( 7 - 7 ) formed at a central position of the disc plate ( 7 - 1 ) to be insertable into the rotary shaft groove ( 6 - 2 ), a first rivet tetragonal groove ( 7 - 5 ) formed to pass through the protruding portion ( 7 - 7 ), second bolt head protrusion latch round guide grooves ( 7 - 2 ) formed at angular intervals of 120° about the protruding portion ( 7 - 7 ) in “∩” shapes to pass through the disc plate ( 7 - 1 ), a rachet insertion shaft ( 7 - 4 ) formed to be connected to a bottom surface of the disc plate ( 7 - 1 ), to have a diameter smaller than a diameter of the disc plate ( 7 - 1 ), and to extend in a pipe shape, and a rachet tetragonal groove ( 7 - 6 ) formed to pass through a center of the rachet insertion shaft ( 7 - 4 ) and to be concentric with the protruding portion ( 7 - 7 );   an auxiliary motion conversion plate ( 8 ) which is formed in a circular plate shape having a diameter which is the same as a diameter of the second sliding plate and in which a second rivet tetragonal groove ( 8 - 2 ) is formed to be concentric with the rotary shaft groove ( 6 - 2 ), and second bolt head protrusion latch round guide grooves ( 8 - 1 ) each of which one end portion is connected to the second rivet tetragonal groove ( 8 - 2 ) and formed in a “∩” shape about the second rivet tetragonal groove ( 8 - 2 ) to correspond to the second bolt head protrusion latch round guide groove ( 7 - 2 );   second bolt head protrusion latches ( 9 ) each of which is formed in a rod shape and in which a second bolt head protrusion latch irregular portion ( 9 - 1 ) is formed on a bottom surface, second bolt head protrusion latch first circular shaft parts ( 9 - 3 ) are formed to extend in a longitudinal direction, and a sliding plate insertion groove ( 9 - 2 ) is formed in a side surface of the second bolt head protrusion latch first circular shaft parts ( 9 - 3 ); and   a main motion conversion shaft stopper ( 10 ) which is inserted into and protrudes from the stopper movement groove ( 6 - 3 ) of the second sliding plate ( 6 ) and adjusts rotation of the main motion conversion plate ( 7 ).   
     
     
         3 . The spanner box of  claim 2 , wherein the second bolt head protrusion latch first circular shaft parts ( 9 - 3 ) pass through and are inserted into the second bolt head protrusion latch round guide grooves ( 8 - 1 ), the second bolt head protrusion latch movement grooves ( 6 - 1 ), and the second bolt head protrusion latch round guide grooves ( 7 - 2 ) and move along the second bolt head protrusion latch round guide grooves ( 8 - 1 ), the second bolt head protrusion latch movement grooves ( 6 - 1 ), and the second bolt head protrusion latch round guide grooves ( 7 - 2 ) to adjust distances between the second bolt head protrusion latch irregular portions ( 9 - 1 ). 
     
     
         4 . A spanner box comprising:
 a sliding part ( 13 ) which is formed in a pipe shape of which an end surface of one side is closed and in which a circular groove ( 13 - 1 ) and sliding grooves ( 13 - 2 ) disposed at angular intervals of 120° are formed at a central portion of the closed end surface;   third bolt head protrusion latches ( 14 ) each of which is formed in a rod shape and in which an irregular portion ( 14 - 2 ) is formed on a surface which holds a bolt head, an end portion of one rear side of the irregular portion is cut to form an inclined surface ( 14 - 3 ), a central region of a side surface is cut in a direction perpendicular to a longitudinal direction of the rod shape to form a movement groove ( 14 - 1 );   a pressing shaft ( 15 ) which is formed in a cylindrical shape and in which latch insertion grooves ( 15 - 1 ) are radially formed in an end portion of one side at angular intervals of  120 ° in an axial direction of the pressing shaft ( 15 ) so that the third bolt head protrusion latches ( 14 ) are insertable into the latch insertion grooves ( 15 - 1 ), inclined surfaces ( 15 - 2 ) corresponding to the inclined surfaces ( 14 - 3 ) of the third bolt head protrusion latches ( 14 ) are formed in the latch insertion grooves ( 15 - 1 ), a central shaft of an end portion of the other side extends to form a rivet connection shaft ( 15 - 3 ), and a rivet groove ( 15 - 5 ) is formed to pass through an end portion of the rivet connection shaft; and   a main body ( 16 ) which is formed in a pipe shape of which one side is closed and in which an inner circumference is formed so that the pressing shaft ( 15 ) is rotatably inserted into the main body ( 16 ), a lever connection shaft ( 16 - 4 ), in which an insertion hole is formed to pass through a central portion of the closed end portion and the rivet connection shaft ( 15 - 3 ) is insertable into the insertion hole, is formed to protrude, a second rivet groove is formed in the lever connection shaft ( 16 - 4 ) at a position corresponding to the rivet groove ( 15 - 5 ) when the rivet connection shaft ( 15 - 3 ) is inserted, and a circular rod-shaped grip ( 16 - 2 ) passes through and is coupled to the rivet groove ( 15 - 5 ).   
     
     
         5 . The spanner box of  claim 4 , wherein, in the pressing shaft ( 15 ):
 an outer circumferential surface is formed to have a two-step outer circumference;   end portions of the outer circumference are formed to be different;   the outer circumference is formed to be enlarged at the end portion of the other side to form a spring jaw ( 15 - 4 );   a pressing shaft return spring ( 18 ) is coupled to a side at which the outer circumference is smaller and inserted between the main body ( 16 ) and the pressing shaft; and   the spring ( 18 ) is hooked on the spring jaw ( 15 - 4 ) to return the sliding part ( 13 ) toward the closed end portion.   
     
     
         6 . The spanner box of  claim 4 , further comprising a pressing shaft lever ( 17 ) which is formed as an arc-shaped frame and in which the grip ( 16 ) is connected to an end portion of one side. 
     
     
         7 . The spanner box of  claim 6 , wherein:
 a pressing shaft coupling pin hole ( 17 - 2 ) is formed in a central region of an arc of the pressing shaft lever ( 17 ); and   the pressing shaft lever ( 17 ) is rotatably connected to the rivet connection shaft ( 15 - 3 ) of the pressing shaft ( 15 ) through a pin.